You forgot to tell us we need Ethereum gas fee on the withdraw supply part.

Here is How to Participate In Nebula Protocol Testnet Airdrop
Cost:$0
Time: 5 - 8 minutes
Potential: $350 - $3,500
Eligibility: Open to All Users

Step 1: Claim Nibiru Faucet
Visit the Nibiru Faucet Page:
  https://app.nibiru.fi/faucet
Connect Your Wallet:
   - Open MetaMask in your browser.
   - Switch to the Ethereum network if not already connected.
   - Click "Connect Wallet" and select your wallet.
Submit Your ETH Address:
   - Enter your wallet’s Ethereum address in the designated field.
Claim $NIBI Tokens:
   - Click the "Claim Faucet" button.
   - You will receive 10 $NIBI tokens in your wallet.

Step 2: Supply & Borrow Assets
Access Nebula Lending Protocol:
Go to: https://app.nebulalending.io/
Connect Your Wallet:
   - Click "Connect Wallet" and ensure it’s the same MetaMask wallet you used in Step 1.
Supply Assets:
   - Select the "Supply" option.
   - Enter an amount of $NIBI to supply (you can choose any amount).
   - Click "Supply" again to confirm.
   - Approve the transaction in MetaMask.
Borrow Assets:
   - Select the "Borrow" option from the menu.
   - Enter an amount of $NIBI to borrow.
   - Confirm your selection and approve the transaction in MetaMask.

Note: You can repeat the supply and borrow steps for multiple transactions if needed.

Step 3: Withdraw & Repay Assets
Access Your Portfolio:
   - On the Nebula Lending platform, navigate to the "Portfolio" section.
Withdraw Assets:
   - Locate the "Supply Asset" section in your portfolio.
   - Click the three dots (⋮) next to the asset you supplied.
   - Select "Withdraw" and enter the amount of $NIBI you want to withdraw.
   - Click "Withdraw" and confirm the transaction in MetaMask.

-> Repay Borrowed Assets:
   - Locate the "Borrow Asset" section in your portfolio.
   - Click the three dots (⋮) next to the borrowed asset.
   - Select "Repay" and enter the amount you wish to repay.
   - Confirm the transaction in MetaMask.

Tip: Repeat these steps until you’ve completed all supply, borrow, withdraw, and repay tasks

Step 4: Complete Galxe Tasks
log in on Galxe with the same MetaMask you used on Nebula
Visit the Galxe platform and search for the Nebula Protocol campaign.
Complete all required tasks to earn your OAT (On-Chain Achievement Token) and points.
Follow any additional instructions provided by Galxe to ensure your rewards are claimed.

Final Note
By completing these steps, you’ll maximize your chances of receiving rewards in the Nebula Protocol testnet airdrop.

Stay consistent and ensure all tasks are completed accurately. Good luck!